[tech] DHCP Issues Fixed

[David Adam]

After Adrian abused me by private email, Facebook Messenger and carrier 
pigeon, I just went ahead and did it.

http://cvs.ucc.asn.au/cgi-bin/viewvc.cgi/rancid/ucc/configs/bitumen.ucc.gu.uwa.edu.au?r1=293&r2=294

[DAA]

On Tue, 11 Dec 2012, Adrian Woodley wrote:
> Pansy.
> 
> reload in 2
> conf t
> spanning-tree mode rapid-pvst
> exit
> reload cancel
> 
> On 2012-12-09 21:46, David Adam wrote:
> > On Sun, 9 Dec 2012, John Hodge wrote:
> > > The DHCP issues that have been plauging the UCC network have now been
> > > fixed.
> > > The problem was bitumen was treating all network ports as possible links
> > > to
> > > other switches and attemting a STP handshake on them and hence wouldn't
> > > pass
> > > traffic for a good 30s or so. This meant that when a link came back up
> > > (either
> > > by a reboot or the cable being dislodged) no traffic would flow, and hence
> > > the
> > > DHCP requests weren't seen by murasoi.
> > > 
> > > Portfast has now been enabled by default on all non-trunk ports, save for
> > > a
> > > few that had issues with it (heathred being one, which is why it went down
> > > earlier this evening)
> > > 
> > > tl;dr - Network works again, netboot and wireless should just connect
> > > quite
> > > nicely (and now works better than Unifi again)
> > 
> > We should probably enable Rapid PVST+, which is what we used to run on
> > Coconut until Bitumen took over. I don't really want to do this without
> > having a serial connection to the switch Just In Case, but perhaps someone
> > who is in the machine room could give it a crack.
> > 
> > (It's really as simple as `spanning-tree mode rapid-pvst`.)
> > 
> > I'd be surprised if this fixed perceived issues with the wireless, though;
> > connections from wireless clients won't make the switchport on Bitumen
> > toggle spanning tree state.
> > 
> > However I have just realised that the wireless bridge (the bridge part of
> > which is a Linux software bridge on Coromandel) does run STP, and this is
> > probably messing up DHCP, so I've turned it off.
> > 
> > [DAA]
> > zanchey@
> 
> -- 
> Regards,
> 
> Adrian
> 

Cheers,

David Adam
zanchey at ucc.gu.uwa.edu.au
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